import React from 'react'; //核心库
import ReactDOM from 'react-dom'; //核心dom库
import './index.css'; //公用样式文件
import App from './App'; //引入app组件
import reportWebVitals from './reportWebVitals';

// <React.StrictMode> 检查代码警告
ReactDOM.render(
  <React.StrictMode>
    <App />
  </React.StrictMode>,
  document.getElementById('root')
);

// If you want to start measuring performance in your app, pass a function
// to log results (for example: reportWebVitals(console.log))
// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
reportWebVitals();
